Integrated touch panel for a TFT display

摘要

This relates to displays for which the use of dual function capacitive elements does not result in any decreases of the aperture of the display. Thus, touch sensitive displays that have aperture ratios that are no worse than similar non-touch sensing displays can be manufactured. More specifically, this relates to placing touch sensing opaque elements so as to ensure that they are substantially overlapped by display related opaque elements, thus ensuring that the addition of the touch sensing elements does not substantially reduce the aperture ratio. The touch sensing display elements can be, for example, common lines that connect various capacitive elements that are configured to operate collectively as an element of the touch sensing system.

主权项

1. A touch screen having a touch sensor panel and a display device, the touch screen configured to perform both a display and a touch sensing functionality comprising:
a plurality of pixels, each pixel including a storage capacitor comprising a first electrode and a second electrode; one or more opaque display elements used to perform the display functionality of the touch screen; and a plurality of common lines made from a non-transparent conductor, connected to the first electrode of one or more of the plurality of pixels and positioned at a different layer in the touch screen than the opaque display elements such that the opaque display elements and the common lines substantially overlap one another ; wherein the opaque display elements contribute to an aperture ratio of the display device and the plurality of common lines substantially maintain the aperture ratio of the display device; and wherein the first electrodes connected to the common lines are used for both the display and touch sensing functionalities of the touch screen.